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Subject Test Biology

Question 5 of 24

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SAT Subject Test

The first items in the Biology E/M test are arranged in sets with common answer choices. These items appear in the core section of the test. Remember, these are not MATCHING challenges — each answer choice can be used once, more than once, or not at all.

The inability of two populations to interbreed after being separated by a barrier for a long period of time

Select an Answer

Succession

Correct Answer: 
No

Dispersion

Correct Answer: 
No

Fertilization

Correct Answer: 
No

Speciation

Correct Answer: 
Yes

Mutation

Correct Answer: 
No

The correct answer is speciation. Recall that the functional definition of a species is a group of organisms that can interbreed with each other but do not interbreed with others. The inability to interbreed after long separation is a sign that speciation has occurred; the two populations now represent two different species.

Question Difficulty: 
medium